# CriticalXStreamException in authorizationStrategy

**URL:** https://community.jenkins.io/t/criticalxstreamexception-in-authorizationstrategy/10064
**Category:** Ask a question
**Tags:** question
**Created:** [October 9, 2023, 6:42am UTC](https://community.jenkins.io/t/criticalxstreamexception-in-authorizationstrategy/10064 "2023-10-09T06:42:33Z")
**Posts on this page:** 4
**Page:** 1

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### Author: ![santhosh2](https://avatars.discourse-cdn.com/v4/letter/s/73ab20/32.png) [@santhosh2](https://community.jenkins.io/u/santhosh2)
#### Post date: [October 9, 2023, 6:42am UTC](https://community.jenkins.io/t/criticalxstreamexception-in-authorizationstrategy/10064/1 "2023-10-09T06:42:33Z")

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any solution for this error

 ![image](https://europe1.discourse-cdn.com/flex013/uploads/jenkins/original/2X/e/ee010c0f795d1e6c3645976b65914ca8d3ebda86.png)

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### Author: ![Ian\_W](https://avatars.discourse-cdn.com/v4/letter/i/cab0a1/32.png) [@Ian\_W](https://community.jenkins.io/u/Ian_W)
#### Post date: [October 9, 2023, 10:38am UTC](https://community.jenkins.io/t/criticalxstreamexception-in-authorizationstrategy/10064/2 "2023-10-09T10:38:58Z")

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Hi, when requesting help from others, it helps IF YOU:

- Provide a relevant title,
- Provide the error message as text, not an image of text. It’s harder to read and not indexable.
- Version of Jenkins, installation information, maybe relevant plugins and versions
- Provide some context as to what was happening/what you were when the error was triggered. Was this a configuration change, a job, an upgrade, etc.
- Only provide images if they convey additional value

So, at this time, no. I don’t even look at images of stack dumps.

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### Author: ![santhosh2](https://avatars.discourse-cdn.com/v4/letter/s/73ab20/32.png) [@santhosh2](https://community.jenkins.io/u/santhosh2)
#### Post date: [October 9, 2023, 10:54am UTC](https://community.jenkins.io/t/criticalxstreamexception-in-authorizationstrategy/10064/3 "2023-10-09T10:54:16Z")

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Hi @Ian_W

Today i tried to upgrade my jenkins,

After Restated my jenkins service i can’t able to see login page

it throw error as mentioned below  
com.thoughtworks.xstream.mapper.CannotResolveClassException: hudson.security.GlobalMatrixAuthorizationStrategy

Caused: jenkins.util.xstream.CriticalXStreamException:  
---- Debugging information ----  
cause-exception : com.thoughtworks.xstream.mapper.CannotResolveClassException  
cause-message : hudson.security.GlobalMatrixAuthorizationStrategy  
class : hudson.model.Hudson  
required-type : hudson.model.Hudson  
converter-type : hudson.util.RobustReflectionConverter  
path : /hudson/authorizationStrategy  
line number : 12  
version : 2.426

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### Author: ![Ian\_W](https://avatars.discourse-cdn.com/v4/letter/i/cab0a1/32.png) [@Ian\_W](https://community.jenkins.io/u/Ian_W)
#### Post date: [October 9, 2023, 10:38pm UTC](https://community.jenkins.io/t/criticalxstreamexception-in-authorizationstrategy/10064/4 "2023-10-09T22:38:43Z")

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And what prompted you to restart Jenkins? did you change anything before that?